[Script Info]
Title:
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.00,Default,,0000,0000,0000,,So the question is: suppose that Alice forgets the value that she used
Dialogue: 0,0:00:03.00,0:00:08.00,Default,,0000,0000,0000,,for the initialization vector--she encrypted some file, she has the ciphertext
Dialogue: 0,0:00:08.00,0:00:14.00,Default,,0000,0000,0000,,and she has the key. Can she still recover n, even though she forgot the IV?
Dialogue: 0,0:00:14.00,0:00:16.00,Default,,0000,0000,0000,,--the Initial Value--
Dialogue: 0,0:00:16.00,0:00:20.00,Default,,0000,0000,0000,,So the answers are: "No," she can't recover any of them;
Dialogue: 0,0:00:20.00,0:00:24.00,Default,,0000,0000,0000,,"Almost," that she can recover all of them except for the very first block;
Dialogue: 0,0:00:24.00,0:00:28.00,Default,,0000,0000,0000,,"Almost," that she can recover all of them except for the first and the second block;
Dialogue: 0,0:00:28.00,9:59:59.99,Default,,0000,0000,0000,,or that she can only recover the very last block of n.